Means for curing tires



mmmw

H. F. WATERS MEANS FOR CURING TIRES Aug. 28, 1923 Original Filed July 151921 A TTORNE Y.

Patented Aug. 28, 1923.

UNITED STAT 1,466,318 FF! c a.

HARRY F. WATERS, OF DENVER, COLORADO, ASSIGNOR 'I'O KARL C. SCEUYLER,TRUSTEE, OF DENVER, COLORADO.

EEANS FOR CURING TIRES.

Application filed July 15, 1921, Serial No. 484,849. Renewed January 25,1928. Serial No. 534,588.

To all w from it may concern:

Be it known that I, HARRY F. WA'rnRs, a citizen of the United States,residing at the city and county of Denver and State of Colorado. haveinvented certain new and useful Improvements in Means'for Curing Tires;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being badto the accompanying drawings, and to the characters of reference markedthereon, which form a part of this specification.

This invention relates to a method and means for curing tires and hasfor its object to dispense with the costly air bag now in use andsubstitute therefor a cheap bag made of paper or equivalent material.

The air bags used in curing tires are, as stated above, costly anddeteriorate very rapidly thus adding materially to the cost of thetires, for this reason experiments have been conducted for the purposeof eliminating them entirely but so far as I am aware, with theexception of the method outlined in my copending application Serial No.82,501, filed July 5, 1921, they have all resulted in failures and havebeen abandoned.

In my present invention I do not aim to dispense with the air bag butrather to provide a bag of such material as paper or the like which ischeap and in which the deterioration will amount to only a smallfraction per tire of the amount when the ordinary curing bag is used.

In order to more clearly describe my invention I shall have reference tothe attached drawing in which Fig. 1 is a cross section in which oneform of my invention is shown.

Fig. 2 shows a cross section of a modified form.

Fig. 3 shows a fragmentary longitudinal section of the tube shown inFig. 4.

Fig. 4 shows a cross section taken on line 4-4, Fig. 3, and

Fig. 5 shows a longitudinal section of a.

tube provided with means to permit of longitudinal expansion.

The same reference characters indicate the same parts throughout thedifi'erent views.

'In Fig. 1 I have shown a carcass 1 mounted on the usual rim 2 andenclosed in the curing mould 3, which is made in two parts. The carcassis lined on the inside with paper 4 which extends to the inner surfaceof the rim 2. A flap 5, also of paper, is provided for the purpose ofobtaining an air tight seal, a valve 6 being attached to paper flap 5and extending through the rim in the manner shown. The paper must, ofcourse, be air tight and for this purpose a paper hav ing this propertyis selected or else it must be given a coating of some substance thatwill fill the pores and render it air tight. A fluid such as air orwater is introduced into the chamber 7 and sufficient pressure appliedto force the carcass into the mould after which the whole is subjectedto the proper degree of heat and cured.

In Fig. 2 I have introduced within the chamber 7 a paper tube 8 providedwith an air valve stem 6. The paper tube is made with two longitudinalfolds 9, to allow for the requisite expansion of the tube as pressure isapplied to the inner surface thereof to force the carcass against thewalls of the mould. It will be noticed that when a paper tube of thistype is used the rim 2 can be dispensed with and the whole enclosed inthe curing moulds 4.

In Figs. 3 and 4: I have shown a paper tube 10 which is well adapted forthe purpose under consideration. This tube has a part of its surfacecorrugated as indicated by reference numeral 11 whereby it is adapted toexpand longitudinally. In order to permit it to be used in chambers ofdifferent sizes it is provided with a longitudinal lap joint 12 asclearly illustrated in Fig. 4. A valve stem 6 is provided for theintroduction of the fluid. When d tube like that shown in Figs. 3 and 4is used, the rim 2 can be dispensed with and the carcass encloseddirectly within the curing moulds as shown in Fig. 2.

In Fig. 5 I have shown a modified tube 13 in which longitudinalexpansion is provided for by means of an annular fold 14. This tube isused in the same manner as' tubes 8 and 10. Instead of an annular foldas shown, the tube may be cut and one end inserted into the otherresulting in a slip joint.

From the above it appears that I have invented a cheap tube of paperthat can be used for replacing the costly air bag now in use in curingautomobile and similar tires. These tubes are cheap as to first cost andare also capable of withstanding the strain of repeated use, thusresulting in a very economical device for the purpose underconsideration.

Having described my invention what I claim asnew and desire to haveprotected by Letters Patent is:

1. An air bag for use in curing tires comprising a paper tube.

2. An air bag for use in curing tires comprising a paper tube providedwith means to permit it to expand to fill the chamber in the tirecarcass.

3. An air bag for use in curing tires com- I prising a paper tube,provided with means to permit it to expand longitudinally so as to tillthe chamber in the tire carcass.

4. An air bag for use in curing tires comprising a paper tube, providedwith means to permit it to expand longitudinally and transversely so asto fill the chamber in the tire carcass.

5. An air bag for use in curing tires comprising an annular paper tube.

naeaeae 6. An air bag for use in curing tires comprising an annularpaper tube rovided with means to permit it to expan so as to fill thechamber in the tire carcass.

7. An air bag for-use in curing tires comprising an annular paper tube,provided with means to permit it to expand longitudinally so as to fillthe chamber in the tire carcass.

8. An air bag for use in curing tires comprising an annular paper tubeprovided with means to permit it to expand longitutudinally andtransversely so as to completely fill the chamber in said tire carcass.

9. An air bag for use in curing tires comprising an annular paper" tubehaving a longitudinal lap joint and transverse corrugations whereby itcan expand both transversally and longitudinally.

10. A. sisting. of paper, rovided' with'means to permit it to expan soas to fill the chamber in the tire carcass.

In testimony whereof ll ailix my signature.

HARRY r. Warnns.

lining for use in curing tires, con-

